Re: [R] list of valid characters in object names
On Sat, Jul 27, 2013 at 3:08 PM, Duncan Murdoch wrote: > Your question is a little ambiguous. All characters are allowed in object > names, but the parser will only recognize some of them if they are quoted in > backticks. > > The ones it recognizes without the backticks are ones that the C isalnum() > (or iswalnum()) function declares to be alphanumeric, plus . and _. Your > list above are all allowed, but locales are allowed to declare other > characters to be alpha. I wouldn't recommend using anything else, because > your code won't be recognized in other locales. > > The definitive reference for this is the source code, specifically > src/main/gram.y. There's some discussion in the Intro to R manual, section > 1.8. > Exactly what I was looking for. Thank you, Liviu __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] list of valid characters in object names
On 13-07-27 7:36 AM, Liviu Andronic wrote: Dear all, Could someone please point me to the definitive list of valid characters that are allowed in object names in R? I believe that the following list covers them: _.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 but I would like to make sure. Your question is a little ambiguous. All characters are allowed in object names, but the parser will only recognize some of them if they are quoted in backticks. The ones it recognizes without the backticks are ones that the C isalnum() (or iswalnum()) function declares to be alphanumeric, plus . and _. Your list above are all allowed, but locales are allowed to declare other characters to be alpha. I wouldn't recommend using anything else, because your code won't be recognized in other locales. The definitive reference for this is the source code, specifically src/main/gram.y. There's some discussion in the Intro to R manual, section 1.8. Duncan Murdoch __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] list of valid characters in object names
Dear all, Could someone please point me to the definitive list of valid characters that are allowed in object names in R? I believe that the following list covers them: _.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 but I would like to make sure. Thank you, Liviu -- Do you know how to read? http://www.alienetworks.com/srtest.cfm http://goodies.xfce.org/projects/applications/xfce4-dict#speed-reader Do you know how to write? http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e-mail __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
